{"product_id":"oil-immersed-substation-power-transformer","title":"Oil-Immersed Substation Power Transformer","description":"\u003cp\u003eAn oil-immersed substation power transformer changes voltage between electrical systems, using insulating oil as part of its insulation and cooling arrangement. HEAKOR accepts project enquiries for utility, industrial and other substation applications. The proposed transformer must be matched to the system study, site layout and approved specification.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/hi\/pages\/contact\"\u003eSubmit your substation transformer requirements\u003c\/a\u003e with the required rating, voltages and project destination.\u003c\/p\u003e\n\u003ch2\u003eWhat must be specified before quotation?\u003c\/h2\u003e\n\u003cp\u003eFor an oil-immersed substation power transformer, the MVA rating is only the starting point. Provide the electrical design requirements and installation constraints together so the quotation can define the equipment and document scope.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem ratings:\u003c\/strong\u003e kVA or MVA, high- and low-voltage ratings, tertiary winding requirements if applicable, phase and frequency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical design:\u003c\/strong\u003e vector group, neutral arrangement, impedance, system fault level, insulation levels and tapping requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal performance:\u003c\/strong\u003e cooling method, loading profile, losses, temperature-rise limits and noise requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSite and interfaces:\u003c\/strong\u003e ambient temperature, altitude, terminal arrangement, available space, transport and lifting restrictions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupply scope:\u003c\/strong\u003e protection, monitoring, controls, accessories, required tests and documents.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSubstation transformer questions and answers\u003c\/h2\u003e\n\u003ch3\u003eCan I select a transformer by MVA alone?\u003c\/h3\u003e\n\u003cp\u003eNo. Voltage ratio, frequency, winding connections, impedance and insulation requirements must also match the electrical system. Submit the single-line diagram and specification; flag any values still awaiting engineering approval.\u003c\/p\u003e\n\u003ch3\u003eWhich tap changer and cooling arrangement do I need?\u003c\/h3\u003e\n\u003cp\u003eState the required voltage adjustment range, whether adjustment is needed under load, and the loading and cooling requirements. The tap-changer type and cooling arrangement must be confirmed for the proposed design. Do not assume either is included as standard.\u003c\/p\u003e\n\u003ch3\u003eWhich standards and approvals apply?\u003c\/h3\u003e\n\u003cp\u003eSpecify the required standard number and edition, destination-country rules, utility requirements and any mandatory certification. An oil-immersed substation power transformer must be reviewed against the exact project scope; product standards, efficiency rules, certification and utility approval are separate checks.\u003c\/p\u003e\n\u003ch3\u003eWhat documents should I request?\u003c\/h3\u003e\n\u003cp\u003eIdentify the datasheet, general arrangement drawing, terminal details, control drawings and test documentation required by your project. State any witness-test or inspection requirements before ordering. The documents and tests included in supply must be agreed in writing.\u003c\/p\u003e\n\u003ch3\u003eWhat is needed for a replacement unit?\u003c\/h3\u003e\n\u003cp\u003eProvide the existing nameplate, drawings, connection details and available installation space. Include any changes to the load or network, and identify transport access and outage constraints. An equal MVA rating alone does not establish compatibility.\u003c\/p\u003e\n\u003ch2\u003eRequest an oil-immersed substation power transformer quotation\u003c\/h2\u003e\n\u003cp\u003eSend HEAKOR your company name, application, project stage, quantity, destination and required delivery schedule. Include the specification or mention the drawings available for review. Identify the delivery term and named place if already decided. Final ratings, compliance, tests, price and delivery require written technical and commercial confirmation.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/hi\/pages\/contact\"\u003e\u003cstrong\u003eSubmit project specifications to HEAKOR\u003c\/strong\u003e\u003c\/a\u003e. For the category overview, see \u003ca href=\"\/hi\/collections\/power-class-substation-transformers\"\u003esubstation transformers\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eBefore requesting a quotation, use the \u003ca href=\"\/hi\/blogs\/news\/transformer-rfq-checklist\"\u003etransformer RFQ checklist\u003c\/a\u003e to organize your specifications and open questions. The \u003ca href=\"\/hi\/blogs\/news\/custom-transformer-project-requirements\"\u003eproject requirements guide\u003c\/a\u003e explains how to define the requested equipment and document scope.\u003c\/p\u003e","brand":"HEAKOR","offers":[{"title":"Default Title","offer_id":47707966210219,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/2488\/2347\/files\/exec-a716ff8a-250b-4142-8309-094e23dbf354.png?v=1787882681","url":"https:\/\/heakortransformer.com\/hi\/products\/oil-immersed-substation-power-transformer","provider":"Heakor transformer","version":"1.0","type":"link"}